EP0403125A2
Expired / Lapsed
EP
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Zoom mode operations in display apparatus
Assignee: International Business Machines Corp
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Filing: 1990-05-31
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Granted: —
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Expires: 2010-05-31
Abstract
Abstract An Image Editor includes a ZOOM function wherein other Image Editor actions are invokable and operable in whatever zoom level is currently in effect. The zoom mode is a state of the Image Editor in that invoked actions are performed in a normal 1X pel size image but are displayed to an operator in an enlarged, fat pel, zoom equivalent. When the ZOOM function is invoked a displayed zoom window is automatically centred upon a present position of a cursor as is also a selectively displayable viewport, the viewport showing the relative position of the cursor within the 1X image.
Inventors
- 👤 Peter Cornelius Yanker
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 21:09
CPC Classifications
G; G06; G06T; G06T3/00; G06T3/40; G06F; G06F3/00; G06F3/01; G06F3/048; G06F3/0484; G06F3/04845
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
172 words
In a system having image display means comprising a plurality of pels, a method of zoomed operation comprising the steps of: responsive to a request from a user, entering a zoom mode of operation wherein a displayed image is magnified; storing in a memory an unmagnified copy of the image; responsive to an indicator positioned by the user within the displayed image, determining the indicator position in coordinates associated with the unmagnified copy of the image; determining a magnification level currently in effect and a required display size of a pel magnified to the current magnification level; responsive to the determined indicator position and to a predetermined maximum display size, determining coordinates, relative to the unmagnified copy of the image, of a first window defining a portion of the image to be displayed as a magnified image, the indicator position being located substantially at a centre of the first window; and displaying the magnified portion of the image within the first window, the magnified portion being displayed with the magnified pel size.
Claim 2
Dependent Claim
172 words
In a system having image display means comprising a plurality of pels, a method of zoomed operation comprising the steps of: responsive to a request from a user, entering a zoom mode of operation wherein a displayed image is magnified; storing in a memory an unmagnified copy of the image; responsive to an indicator positioned by the user within the displayed image, determining the indicator position in coordinates associated with the unmagnified copy of the image; determining a magnification level currently in effect and a required display size of a pel magnified to the current magnification level; responsive to the determined indicator position and to a predetermined maximum display size, determining coordinates, relative to the unmagnified copy of the image, of a first window defining a portion of the image to be displayed as a magnified image, the indicator position being located substantially at a centre of the first window; and displaying the magnified portion of the image within the first window, the magnified portion being displayed with the magnified pel size.
Claim 3
Dependent Claim
83 words
A method as claimed in claim 1, wherein the step of determining the first window coordinates includes a step of determining coordinates, relative to the unmagnified copy of the image, of a second window for defining a portion of the image to be displayed as an unmagnified image, the indicator position being located substantially at a centre of the second window, and wherein the step of displaying includes a step of simultaneously displaying the second window with the display of the first window.
Claim 4
Dependent Claim
43 words
A method as claimed in claim 2, wherein the first window has an area equal to approximately a maximum displayable area of the image display means and wherein the second window has an area of approximately one sixteenth that of the first window.
Claim 5
Independent Claim
125 words
A method as claimed in any preceding claim, and responsive to a request by a user to modify the magnification level currently in effect, comprises the additional steps of: determining a required display size of a pel magnified to the modified magnification level; and responsive to the determined indicator position and to a predetermined maximum display size, determining coordinates, relative to the unmagnified copy of the image, of the first window for defining a portion of the image to be displayed as the magnified image, the indicator position being located substantially at the centre of the first window; and displaying the magnified portion of the image within the first window, the magnified portion being displayed with the magnified pel size at the modified magnification level.
Claim 6
Independent Claim
45 words
A method as claimed in any preceding claim, and responsive to input from the user to move the position of the indicator includes a step of repositioning the indicator in a desired direction to substantially an edge of the window of the displayed magnified portion.
Claim 7
Dependent Claim
42 words
A method as claimed in claim 5, and responsive to a further input from the user to move the position of the indicator includes a step of repositioning the indicator to substantially the centre of the window of the displayed magnified portion.
Claim 8
Independent Claim
45 words
A method as claimed in any preceding claim, and responsive to an input from the user to move the position of the indicator includes a step of repositioning the indicator in a desired direction to substantially an edge of the unmagnified copy of the image.
Claim 9
Dependent Claim
41 words
A method as claimed in claim 7, and responsive to a further input from the user to move the position of the indicator includes a step of repositioning the indicator to substantially the centre of the unmagnified copy of the image.
Claim 10
Independent Claim
29 words
A method as claimed in any preceding claim, wherein the indicator is displayed within the first window as a visually distinct group of pels having a transparent central portion.
Claim 11
Dependent Claim
27 words
A method as claimed in any claim appendant to claim 2, wherein the indicator is displayed in the second window in accordance with a user specified shape.
Claim 12
Dependent Claim
34 words
A method as claimed in any claim appendant to claim 2, and responsive to input from the user further includes displaying or not displaying the second window with the display of the first window.
Claim 13
Independent Claim
65 words
A method as claimed in any preceding claim and, responsive to a request from the user to modify the image, includes the steps of: modifying the unmagnified copy of the image, and for a portion of the unmagnified image within the first window; displaying the magnified portion of the modified image within the first window, the magnified portion being displayed with the magnified pel size.
Claim 14
Independent Claim
61 words
A method as claimed in any preceding claim and responsive to a request from a user to terminate the zoom mode of operation includes a step of saving a magnification level currently in effect such that a subsequent request from a user to enter the zoom mode of operation causes the saved magnification level to be the magnification level in effect.
Claim 15
Dependent Claim
43 words
A method as claimed in any claim appendant to claim 2, wherein, responsive to a user causing the indicator within the first window to intersect an edge of the second window includes a step of repositioning the second window within the first window.
Claim 16
Dependent Claim
107 words
A method as claimed in any claim appendant to claim 2, wherein, responsive to a user causing the indicator within the second window to intersect an edge of the second window includes the steps of: determining coordinates, relative to the unmagnified copy of the image and to the size of the second window, of a portion of the unmagnified copy of the image adjacent to the intersected edge; and displaying the adjacent portion of the unmagnified copy of the image within the second window, the unmagnified portion being displayed with the indicator positioned substantially adjacent to an edge of the second window opposite to the intersected edge.
References Cited (Backward Citations)
No citation records indexed.
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